drm/nvc0/dmaobj: implement initial bind() method

Currently unused.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

drivers/gpu/drm/nouveau/core/engine/dmaobj/nvc0.c

@@ -39,7 +39,9 @@ nvc0_dmaobj_bind(struct nouveau_dmaeng *dmaeng,
 		 struct nouveau_dmaobj *dmaobj,
 		 struct nouveau_gpuobj **pgpuobj)
 {
-	int ret = 0;
+	u32 flags0 = nv_mclass(dmaobj);
+	u32 flags5 = 0x00000000;
+	int ret;
 
 	if (!nv_iclass(parent, NV_ENGCTX_CLASS)) {
 		switch (nv_mclass(parent->parent)) {
@@ -49,6 +51,61 @@ nvc0_dmaobj_bind(struct nouveau_dmaeng *dmaeng,
 	} else
 		return 0;
 
+	if (!(dmaobj->conf0 & NVC0_DMA_CONF0_ENABLE)) {
+		if (dmaobj->target == NV_MEM_TARGET_VM) {
+			dmaobj->conf0  = NVC0_DMA_CONF0_PRIV_VM;
+			dmaobj->conf0 |= NVC0_DMA_CONF0_TYPE_VM;
+		} else {
+			dmaobj->conf0  = NVC0_DMA_CONF0_PRIV_US;
+			dmaobj->conf0 |= NVC0_DMA_CONF0_TYPE_LINEAR;
+			dmaobj->conf0 |= 0x00020000;
+		}
+	}
+
+	flags0 |= (dmaobj->conf0 & NVC0_DMA_CONF0_TYPE) << 22;
+	flags0 |= (dmaobj->conf0 & NVC0_DMA_CONF0_PRIV);
+	flags5 |= (dmaobj->conf0 & NVC0_DMA_CONF0_UNKN);
+
+	switch (dmaobj->target) {
+	case NV_MEM_TARGET_VM:
+		flags0 |= 0x00000000;
+		break;
+	case NV_MEM_TARGET_VRAM:
+		flags0 |= 0x00010000;
+		break;
+	case NV_MEM_TARGET_PCI:
+		flags0 |= 0x00020000;
+		break;
+	case NV_MEM_TARGET_PCI_NOSNOOP:
+		flags0 |= 0x00030000;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (dmaobj->access) {
+	case NV_MEM_ACCESS_VM:
+		break;
+	case NV_MEM_ACCESS_RO:
+		flags0 |= 0x00040000;
+		break;
+	case NV_MEM_ACCESS_WO:
+	case NV_MEM_ACCESS_RW:
+		flags0 |= 0x00080000;
+		break;
+	}
+
+	ret = nouveau_gpuobj_new(parent, parent, 24, 32, 0, pgpuobj);
+	if (ret == 0) {
+		nv_wo32(*pgpuobj, 0x00, flags0);
+		nv_wo32(*pgpuobj, 0x04, lower_32_bits(dmaobj->limit));
+		nv_wo32(*pgpuobj, 0x08, lower_32_bits(dmaobj->start));
+		nv_wo32(*pgpuobj, 0x0c, upper_32_bits(dmaobj->limit) << 24 |
+					upper_32_bits(dmaobj->start));
+		nv_wo32(*pgpuobj, 0x10, 0x00000000);
+		nv_wo32(*pgpuobj, 0x14, flags5);
+	}
+
 	return ret;
 }
 

drivers/gpu/drm/nouveau/core/include/core/class.h

@@ -69,6 +69,17 @@ struct nv_device_class {
 #define NV50_DMA_CONF0_TYPE_LINEAR                                   0x00000000
 #define NV50_DMA_CONF0_TYPE_VM                                       0x0000007f
 
+/* NVC0:NVD9 */
+#define NVC0_DMA_CONF0_ENABLE                                        0x80000000
+#define NVC0_DMA_CONF0_PRIV                                          0x00300000
+#define NVC0_DMA_CONF0_PRIV_VM                                       0x00000000
+#define NVC0_DMA_CONF0_PRIV_US                                       0x00100000
+#define NVC0_DMA_CONF0_PRIV__S                                       0x00200000
+#define NVC0_DMA_CONF0_UNKN /* PART? */                              0x00030000
+#define NVC0_DMA_CONF0_TYPE                                          0x000000ff
+#define NVC0_DMA_CONF0_TYPE_LINEAR                                   0x00000000
+#define NVC0_DMA_CONF0_TYPE_VM                                       0x000000ff
+
 struct nv_dma_class {
 	u32 flags;
 	u32 pad0;